Machine for making stovepipe casing



July 1-6, v1935. H. U BAKER MACHINE FOR MAKING 4SIOVERIPE CSING 5 Sheets-*Sheet l Filed July 18, 1932 m@ Q NN AQ Wm. Am.. Nm

my m, w35, H. U. BAKER 2,007,996

MACHINE FOR MAKI`NG STOVEPIPE CASING Filed July 18, 1952 l 5 Sheets-Sheet 2 A fro ,QA/Ex July M, 193 H. u. BAKER Y2,007,996

` MACHINE FOR MAKING STOVEPIPE cAslNG Filed July 18, 1952 5 Sheets-Sheet 3 Patented July 16A, '1935 IUJNITso STATES f attrae Macrnnafroeivmnmo s'rovarlrn Casino Harold U. Baker, South Pasadena, Calif.` nppiieatiesuiy 1s, iesaseriai No. 623,053

' si claims. (o1. 2er-s3) My invention relates to the art of making pipe or casing, such as stovepipe casing used at the surface ofan oil well or in the lining of water wells. f 1

As commonly used, 'stovepipe casing consists of inner and `outer `tubular members placed one within the other and with the joints thereof overlapping,` the result being that no flanges or :threaded couplings arerequired. Thesel .casing vmembershave in the pastbeenmade of sheet steel rolled into tubular form with the edges there- `of overlapped andriveted together, .and of `late years stovepipe casing has been made in some relatively few instances by weldingthe seams electrically.

The inner and outer tubular members consti- 'tuting a stovepipe casing should be snugly fitted'if a rigid structure of maximum strength'is to..be :attained in an` assembly of stovepipe casing members. To closely t the inner and-outer members is diflicultin themethods of manufacture -now followed. Y

My present invention has for one ofA its obzjects to provide a machine for economically Inak-` 5 :ing stovepipe casing members .of practically true cylindrical form and with a minimum tolerance in diametral dimension. f

It is an Vobject of the invention to provide a device which will receive a sheet of metal rolled to tubular form and will weld the .longitudinal i seam; trimfthe weld, and4 size the .tubular part `.thus formed, in al continuous operation. The device is so constructed that it` will size the inner :diameters of the outer casing members and the external diameters of the inner casing members.

It is an object of my invention to provide a i :tubular form;` through this annular space, and

meansfonwelding the seam and trimming the weld duringthe passage of the tubularmember through theannular space, the Vfinishedcasing "part being diametrally sized by thev inner and "outer die members.' i

i It is an object offthe invention to provide a 4device of thecharacter set forth thepreceding paragraph having a pusher equipped with a head adaptedto engage the tubularA member and'rforce Ait through the annular space `provided by the die members, and having an axially extending bar fori-holding `'the inner head or'die member within fwelding. i The preferred form 4the .outer die member during the forcing of the tubular member therethrough, there being means formovingthe bar to and from engagementwith the inner die member so that the tubular members may be movedin a lateral direction relativ to the longitudinal axis of the device. Further `objects and advantages of the invention will be set forth in the following part of the speciiication. Referring to the drawings, Vwhich are for illustrative purposes only, Y

Fig.. 1 is a plan view of a preferred form of myV invention". p

Fig. 2 is an elevation corresponding to Fig. l. Fig. Bris an enlarged fragmentary section on a plane represented by the line 3 3 of Fig. 1.

Fig. 4 is an enlarged fragmentary sectionon a plane represented by `the line fl-a of Fig. 1.

.Fig. 5I is anv enlarged cross section cn a plane represented by the line 5 5 of Fig. 2. Figiis across section on a plane represented by the line 6--6 of Fig. 3. Y

Fig. 7 is a perspective view of the inner die memtber shown in the drawings.

Fig. 8 `is a perspective view of the spider for supporting the inner die member.

* Fig. 9 is a fragmentary sectional view showing the manner in whichan automatic welding head Ais employed inthe practice ofthe invention as an alternative to weldinglthe longitudinal seam of a tubular member before it is finished while'being moved through the annular space formed by the .die members.

fFig. 10 is a fragmentary perspective view showing a pipe seam prior to welding.

Fig. ll isa partly sectioned,fragmentary per- `spective view showing .a seam formed by flash of my machine, shown in' the drawings', includes a base'i5 including longi-V tudinal structural members such as I-beams MiY set into a concrete foundation or floor il. Ona plate i8 disposed at substantially the center ofthe `base i5 a support 2@ is mounted, this support, as

`shownin Fig.6, having a semi-circular wall 2! disposed on the.longitudinal` axis of the `machine andbeing adapted to .receive an outer die mem.-

Iing la split 24 alongfc'ne side-thereof in .which shims' are removably placed Yforivarying the tion of the diemember 22 are lugs 2,8 by which rio ber 22- embodying a cylindrical steel wall 23 havthe die member 22 is secured to the support 20 through the use or" bolts 35 which thread into a side wall 3l of the support 25.

At the leftward end of the base i5 is a motivating or pushing device 32 comprising a cylinder 33, a piston 3:5 operative within the cylinder 32, and a pushing head 35 on the forward or rightward end of the piston 35.. The motivating device 32 is tied to the support 29 by virtue of its being secured to the longitudinal beams I6 of the base i5 and may be further tied to the support 25 by use of a tie bar 3G, the ends of which extend through a boss 3l on the motivating device 32 and an opening 38 in the upper part of the support 23.

An inner die member of cylindrical form is placed within the outer die member, as best shown in Figs. 3 and 6. rIhis die member comprises a cylindrical wall 4i having a split 42 at one side thereof, with nanges i3 along the split 42 which may be bolted together by means of bolts 44, there being a longitudinal wedge 45 for determining the separation of the iianges 43 and consequently the diameter of the inner die member 4D within a limited range. Projecting inwardly from the wall Il! of the inner die member 4!) are Vribs or webs 46 having shoulders 4l on their inner edges, these webs 4G being adapted to engage outwardly extending webs 48 of a spider 50 which has an annular wall 5I with a conical bore 52 therein adapted to receive the conical head 53 of a thrust bar 54. The webs 48 of the spider 5U are provided with shoulders 55 adapted to engage the shoulders l o1" the inner die member, and in one of the webs 43 of the spider 5D is a semi-circular notch 55 which cooperates with a notch 51.' in a web of the inner die member 4G t0 provide an opening for a bolt 58, which bolt 58 has the purpose of keeping the webs 48 and l5 in alignment and preventing removal of the spider 55 from the interior of the inner die member 40.

The purpose of the thrust bar 54 is to prevent Irightward movement of the inner die member 40 during the operation ofV the device, and the thrust bar has a tubular wall 63 forming a movable cylinder which is supported in a thrust head 6I mounted at the rightward or rearward end of the base l 5. This thrust head 6l has a longitudinal opening or bore 52, as shown in Fig. 4, with a wheel or rollES at its leftward end adapted to engage a longitudinal groove or keyway 54 formed in the underside of the thrust bar 54, and a wheel or roller 55 at its rightward end adapted to bear against the upper face of the thrust bar 54, the rollers G3 and 55 being respectively mounted on shafts 5G and 5'! carried by brackets Gil and IS. by the wall 55 is a stationary piston 'il mounted on the leftward end'of a bar 'E2 which has its rightward end I3, as shown in Fig. I, secured to a cross bar I4 mounted at the rightward ends of beams l5 which extend rightwardly from the thrust head 6l. At the rightward end of the wall 55 a suitable closure or packing means 'i6 is provided for forming a chamber 'H within the cylindrical wall 5@ to the right of the piston 'I l. Extending longitudinally within the stationary bar 'l2 is a fluid passage I8, the inner or leftward end of which communicates with the chamber 71, and also extending within the bar 'l2 is a fluid passage which communicates with a chamber 8l formed within the cylindrical wall 30 to the left of the piston Il. Mounted at the extreme rightward end of the bar 'i2 is a fitting 82 having a nipple 83 adapted to be connected to fluid piping and Within the cylinder formed communicating with the rightward end of the passage '18, and a nipple 84 which communicates with the passage 85 and is adapted to be connected to fluid piping.

Referring to Fig. 4, when fluid under pressure is delivered into the chamber Il', the pressure thereof against the closure means d6 at the rightward end of the wall 65 results in rightward movement of the thrust bar 54, withdrawing the head 53 thereof from engagement with the bore 52 of the spider 5B and moving the thrust bar 513 into its extreme rightward position, leaving the space 85 between the support 2? and the thrust head 5l exposed. By directing iiuid through the passage 8U into the chamber 8l, the thrust bar 54 may be moved into operative position, at which time the teeth 85 of a locking lever 8l will engage teeth 88 formed on the thrust bar 54 to prevent rearward or rightward movement of the thrust bar 54 as the result of pressure received from the inner die member 45. The locking lever Sl may be actuated by use of a hydraulic cylinder-piston means which is connected to the lever 8l' by means such as a link 9i, the cylinder-piston means Si@ having fluid pipes 82 and 93 communicating with the ends v thereof for transmission of the iiuids used in actuating such device 50. When the thrust bar 54 is in operative position as shown in Fig. 1, it is supported by the rollers 53 and 65. When it is Withdrawnfso as to leave the space 35 clear, it is supported on the roller 63 and a roller 94 carried by a bracket S5 mounted on a post 95 at the rightward end of the base I 5.

In the practice of my invention a tubular member consisting of a sheet of metal rolled to cylindrical form may be welded either before its placement in the machine hereinbefore described or may be welded while in place in the machine, the welding of the tubular member in the machine requiring merely the addition of an automatic electric welding head of well known form. In the practice of my invention where the casing members are welded either externally of the machine or before being moved through the die members for sizing and trimming, a sheet of metal 91 is f rolled to tubular form so as to form a tube blank 58 as shown in Fig. 10, the longitudinal edges i60 and lol of the sheet 91 being brought into conjunction or approximate engagement to form a slit or seam |92 therebetween. The seam |62 of the tube blank 98 is then welded electrically by what is known as the flash method, with the result that the edges |50 and I 5| of the sheet 91 are joined by a longitudinal, welded seam 103 which has metal ribs or flashes H04 and 85 therealong.

The welded tubular member S8 is then placed on a platform lill of a hydraulic elevator or jack w8 mounted below the space |09 between the members 22 and 32, as shown in Figs. 1 and 2,'and is raised by the jack 108 to such position that its axis will be substantially aligned with the axis A-A of the machine. Hydraulic iiuid is then introduced into the cylinder 33 through piping lill to force the piston 34 rightwardly, thereby bringing the head 35 into engagement with the leftward end of the member 98, there being an annular shoulder III formed on the rightward face of the head 35 for centralizing the member Q8. Continued movement of the piston 34 in rightward direction is then employed to force the member 98 nearly all of the way through the die member 22. In Fig. 3 I show the member 98 in position within the die member 22 and ready to be forced on through the die member ber 98a.

22 by a second tubular mem* As shown in Figs. 3 and 6, an opening 3 is formed in theleftward upper portion of the die member 22,' and in the inner wall of the-die member 22 a groove or slot1||4 is extended leftwardly from the opening I3 to the leftward endoi the die member 22, this groove `being of sufcient size to receive the bead or Ilash |04 of the welded seam |03. At the rightward endof the opening H3 means is provided for supporting a trimming tool I l5, such means being shown as an upstandinglug or flange H6 and a clamping plate Ill which is forcedfagainst the upper portion of the tool l5 by screws I8 which thread intothe flange li; In theV inner die member 40, which is held in "place withinthe outer die member 22 by the thrust bar 54, an opening |20 is "formed opposite the opening H3, anda groove or slot mi is extended in the outer face` of `the die member liilleftwardly from the opening |20 to Vthe leftward end of the inner die member dil. `An inwardly extending lug or langel22is provided at the rightward endof the opening we for supporting an inner trimming tool |23, there being a clampingplate |24 secured for this purpose on the iiange `|22by means of `.screws During the relatively slowv rightward movement of the member 98 through' the annular space between the diemembers 22 and 40, the beads or ilashes ille and N5 are removed by the trimming tools liti `and |23, and the member 98 is sized. Where' the tubular or pipe member thus formed is employed in stovepipe casing or well casing, one of such members extends within two adjacent similar members so `that the well casing thus formed` consists of two layers or" tubular` members extending one within the other in such a mannerthat the 4end joints of the cuter members are offset from the end joints of the other members. Accordingly, the` member @d must be sized either externally or internally, depending upon whether it is to be used as an inner casingmember or an cuter casing member; therefore, Afor any given size of v stovepipe well vcasing two sets of inner and'outer die members 22 and ib are employed. In one 'set of rdies the external diameter of the member Si@ is controlled bythe internal diameterof the die member 22, and lin the other set of dies the internal diameter of the member 98 is controlled by the external `diameter of the member ci?. 1, i

As may be understood from the foregoing description, the member @ii has been forced through the die member 22 to the position shown in Fig. 3

f by me risas The head 351s then withdrawn to retracted position as-shown in Figs. 1 and 2,

`and the second rmember 98d is raised into axially aligned'position by the jack |03.` A guide ring "lil may be placed as'shown in Fig.v3 to overlap the adjacent ends of the members98 and @to so as to hold these' ends in alignment.

V'The head` 35 is then moved rightwarolly, with the result that the member 98 `of Fig. 3 is forced on through the die member 22 by the member fida which then assumes the position occupied by the member The member 9B on leaving the die member 22 isreceived on an adjustable table as indicated by dotted lines l30` in Fig. 2. The latch lever .di is then moved into. disengaged position, and iluid under pressure isV delivered through the `inlet nipple 03,fby\use of `suitable piping notshown, 'and the thrust bar54 is moved-rightwardly, withdrawing theconical so asto clear the space 85 and vpermit the nnished pipe membertobe rolled from'the position indicated by the dotted lines |30. The thrust bar 54 is then returned to engagement with the inner die member 40 by the application of fluid under pressure to the chamber 8|. The further operation `is `then merely a repetition of the procedure above describe In Fig. 9 I show the small change necessary in my equipment whereby `to enable the practice of the invention in its complete` form wherein the longitudinal seam of the pipe is welded and trimmed and the pipe is sized in' aY continuous operation. The outer die member 22 is provided with anopening li-ii in the. upper wall thereof largerthan the opening M3 shown in Fig. 3, and over the leftward or forward end of this opening an automaticwelding head Mi is supported by means of a bracket M2. The welding head MI is adapted vto automatically `feed a wire or electrode lili s` as to ll rthe slit or seam |552 of the tubularmember e3 with a weld Ulli, which weld may be cooled by a blast of air, and then as the member S8 moves rightwardly it is trimmed by a trimming tool |45 supported on an upright wall Illia, The inner diemember iii has an opening M8 disposed below the opening illi in which a copper backing-up plate |50 is supported in an adjustable manner on a support i?. In this complete practice of the invention the tubular blank $3 shown in Fig. l0 is delivered directly from the forming rolls to the machine, and the formation of a finished pipe member is performed in themachine'in a continuous operation with the exception ofI the short interruption `required for the placing of new tubular members 98 in position to be forced through the die member 22.

By making a at crsubmerged weld it is possible to avoid the use of the trimming tool, although in the general practice of the invention it is desirable to make a rounded weld and trim the same so that a seam of maximumstreng'th is obtained.

In bringing water Wells into production it is customary to `set the casing in the hole and then,

by use of an insert perforating tool, to perforate j the casing within the water-bearmg zone. The old style of riveted, lappedeseamcasing required that considerable care be taken to avoid the seams while perforating owing to the danger of opening a seam while attempting to force a perforating tool through the casing at the seam. Experience shows that casing made in accordance with my inventionmay be perforated directly through the seam without possibility of injuring thecasing owing to the high percentage of strain maintained ,in the seam.

Herein-I `have described outer and innerk die members 22 and llt. It is to be understood that in the practice oi the inventiononly one of these die members need be in working engagementwith the tubular member SS `to bring it to a desired size, and thatat such time the `other die` member `oper-- ates inthe capacity of a guide.. `Where the cuter die 4member 22 is being used to size the member 90, the inner die member prevents buckling of the member 98.

Although I have hereinV shown and described invention in simple and practical form, it is recognised that certain parts or` elements thereof are representative of other parts, elements', or mechanisms which 'may be used in substantially thesame manner to' accomplish substantially the same results; therefore, it 'isto be understood that .the invention'is not to be limited to the details disclosed herein but is to be accorded the full scope of the following claims.

I claim as my invention:

l. A device of the characterY described, for forming pipe from a tubular member comprised of a metal sheet With its longitudinal edges in conjunction, including: an outer forming die means having an inner tubular surface iiared at its forward end to receive said tubular member; an inner forming die means Within said outer forming die means having an outer face spaced from said outer forming die means a distance to permit passage of said tubular member between said forming die means; means for holding said inner forming die means within said outer forming die means; means for relatively moving said tubular member and said outer and inner 'forming means; means for welding together said longitudinal. edges of said tubular member during its movement through said outer forming die means; and means associated with said die means for removing the extruding portions of the weld before the pipe moves from said die means.

2. A device of the character described, for forming pipe from a tubular member comprised 0f a metal sheet with its longitudinal edges in conjunction, including: an outer forming die having an inner tubular surface flared at its forward end to receive said tubular member, there being an opening in the Wall of said outer forming die; an inner forming die Within said outer forming die having an outer face spaced from said outer forming die a distance to permit passage of said tubular member between said forming dies; releasable means for holding said inner forming die within said outer forming die; means for moving said tubular member through said outer forming die; welding means positioned so as tc operate through said opening in said outer forming die, for Welding together said longitudinal edges of said tubular member as it is moved by said moving means; and means for smoothing the weld as it is moved in the device.

3. A device of the character described, for forming pipe from a tubular member comprised of a metal sheet with its longitudinal edges in conjunction, including: an outer forming die means of tubular form adapted to receive said tubular member; an inner forming die means axially aligned with said outer forming die means; a support for said inner forming die means; motivating means for moving said tubular member through said outer forming die means and over said inner forming die means; and Welding means for Welding together said longitudinal edges of said tubular member during its movement through said outer forming die means, said die means guiding said tubular member as it moves adjacent said Welding means.

4. A device of the character described, for forming pipe from a tubular member comprised of a metal sheenJ with its longitudinal edges in conjunction, including: Van outer forming die means oi tubular form adapted to receive said tubular member; an inner forming die means axially aligned With said outer forming die means; a support for said inner forming die means; motivating means for moving said tubular member between saiddie means; Welding means for welding together said longitudinal` edges of said tubular member during its movement between said die means, said guide means guiding said tubular member as it moves adjacent said Weldingmeans; and means for trimming the Welded seam thus formed. 5. VAV device of the character described, for formingVV pipe from a tubular member comprised of a metal sheet With its longitudinal edges in conjunction and joined by a projecting Weld, includine': an outer forming die of tubular form adapted to receive said tubular member; an inner 'forming die axially aligned with said outer forming die; a support for said inner forming die; means for moving said support into and out of engagement with said inner forming die; motivating means for moving said tubular member through said outer forming die and over said inner forming die; and means associated with ,said forming dies for removing the extruding portions of the weld from` said tubular member as it is moved by said motivating means. 6. A device oi the character described, for forming pipe from a tubular member comprised of ametal sheet with its longitudinal edges in conjunction, including: an outer forming die of cylindrical form adapted to receive said tubular vmember; an inner forming die of a size to nt Within said tubular member; a bar for supporting said inner forming die, said bar detachably engaging said inner forming die and being mounted so as to move axially from engagement with said inner forming die; and means for pushing said tubular member through said outer forming Vdie and over said inner forming die.

'7. A device of the character described, for forming pipe irom a tubular member comprised of a metal sheet with its longitudinal edges in conjunction, including: an outer forming die or^ cylindrical form adapted to receive said tubular member; an inner forming die disposed Within said outer forming die; a bar for supporting said "inner forming die, said bar detachably engaging said inner forming die and being mounted so as Yto move axially from engagement with said inner forming'die; and means for pushing said tubular member through said outer forming die and over vsaid inner forming die.

' 8. A device of the character described, for forming pipe from a tubular member comprised of ametal sheet with its longitudinal edges in conjunction, including: an outer forming die of cylindrical form adapted to receive said tubular member; an inner forming die disposed Within said outer forming die; a bar for supporting said inner forming die, said bar detachably engaging said inner forming die and being mounted so as `to move ariallyfrom engagement with said inner forming die; means for pushing said tubular memb-er through said outer forming die and over said inner forming die; and means for welding Atogether the longitudinal edges of said tubular Ymember as it is moved by said pushing means andprior to its passage past said forming dies. 9. A device of theY character described, for forming pipe from a tubular member comprised .of a metal sheet with its longitudinal edges in conjunction, including: an outer forming die of .cylindrical form adapted to receive said tubular member; an inner forming die disposed Within `said outer forming die; a bar for supporting said inner forming die, said bar detachably engaging 'said inner forming die and being mounted so as to move axially from engagement With said inner -forming die; means for pushing said tubular member through said outer forming die and over 'fsaid inner forming die; and means for Welding together said edges of said tubular member prior tothe movementof said tubular member through said outer iormne die, and trimming the `weld thus formed during movement of said tubular member, i i f 1l). Af device ofthe character described, for formingpipe from a tubular member. comprised of a metal sheetwith its longitudinal ledges in conjunction, including: an outer forming die of cylindrical forni adapted to receive said tubular member; a cylinder spaced'from and aligned with said outer forming die; a piston in said l cylinder .having head adapted to force said tubularimei'nber throughsaid outer 'forming diejfan `inner forming die within said outer forming die;

a bar extending rearwardly from said inner form# ing die,` said bar detachably engaging.said'innei1 forming die; supporting. means engaging the "rearward end of `said bar for holding it,` in engagement with said inneriforming die; and hydraulic means iorlmovingv said bar from engageE 'Inentwith said innerorming die.` l i i 11. A `device ofjthe` character described, for

, forming pipe from tubular :member comprised of a metal sheet with-fits longitudinal edges in conjunction, including: `an outer `forming die of cylindrical form adapted to receivevsaid tubular member;` a cylinder spacedfrm and aligned of ametal sheet with its longitudinalV 'edges inv with said outer forming die; a piston ini said cylinder having a head adapted to force said tu-l i billar` member through said outerforming'die; an

inner forming die within said outenformingrdie;

albar extending rearwardly from'rsaidrinner forining die, said bar detaohably engaging said inner forming die;` i 'supporting means. engaging the rearward `end V,of said bar forholding it irienlgagement `withr said inner forming die; hydraulic means for moving said bar :fromtengagementwith y said inner `forming die; andmeansbetween said cylinder and said forming dies"fcr supporting said tubular member in'a'position'of axial A.alignment withsaidformng dies. i f l 12. AA device of the characterfdescribed, for forming pipe from a tubular member comprised conjunction, including: ,an outer'forming die of cylindrical form adapted to receivesaid tubular member; a cylinder spaced `from and aiignedfwith said outer formingdie; `a piston in said cylinder .having Ya head adapted `to force vsaid `tubularmember through said outeriormingiiie "an inlner forming die. within said outer forming die; a bar extending rearwardly Yfrom 4said'inner formn ing die;y said Vbar'detachably engaging saidinner forming die; `Supporting meansQengaging'the rearward end of said bar fonholdingit in engagement with said inner `forming die; ,hydraulic means for moving ,said bar from engagement with u said inner forming die; means between `said cylinder and said forming dies `for supporting said tubular member in a position of axial .alignment `with said forming dies; and'meansbetween said y forming diesaud saidrsupportngi meansfor said par for receiving said tubular member `from said i forming dies.

l ,13. A device of `the` characterfdescrihed .for sizing a tubular member? including:` an outer die adapted to receive said tubular member; pusher means spacedfrom the forward end ofsaid puter die, said pusher means .comprising a pusher yhead adapted `to engage an Lend or said tubular .rrierrrn ber, and means for motivating said pusher-head toward said loutlerdie; anlinn'erdieaxially aligned With said outer die; ab extendingrearwardly from said `inner die, Saidfbar` detachably engaging said `inner die;A supporting means engaging the rearward endA Qtsaid bar for` holding` itin engagement withtsaid inner die during the op eration .orsa'id pusher means to push said tuv bular"rneniber through said outer dieand over `said inner die; and means for moving said bar from engagement with said inner die.

1,4; A device of. the character described for sizing atubular member, including: an outer die adapted to receive said tubular'member; pusher means spacedfrom the forward end of said outer die, said pusher means comprising a pusher head adapted to engage' an end of said tubular'membei', Yand means for motivating" Asaid pusher head toward outer `diegfan inner die axially aligned With said .outer die; a bar extending rearwardly iromsaid inner' die, saidibar detachably engaging said `inner die;` supporting means engaging `the rearward end said bar Vfor holding it in engagement `with said inner die during the op` erationoi said pusher means to push said tur biliar member through saidV outer dieand over ber, and means for motivatingsaid pusher head toward said outer die an inner die axially aligned with said outer die; abar extend-ing rearwardly from Vsaid inner die, said bar detachably'engagn `ing fsaid inner die; VSupporting means 4engaging thefrearward end oi said bar for holding it in engagement with saidinner dieduring the operation i said pusher means to push said ,tubular member through said outer die and over said inner `die;` means for movingv said bar from engagement with said inner die; supporting means between Said pusher 'means and said dies for, supporting said -tubularmernber in a position Ofiaxial alignment with said dies; and means between said dies and saidsupporting means for said ba'rffor receiving said tubular member from said dies and YSupportingthe same after removal .0f `said bar fromengagement with said inner die'. lid. A device ofthe. character described for sizing a tubular member, including: an outer die adapted to receive said tubularmember; lpusher means 'spacedfrom the forward end oisaid outer die,` said pusher Ameans ccrnprising a pusher head adapted "to 4engage an end of said tubular member, and means for motivating said pusherhead toward said outer die; an inner die axially aligned `with said outer diegfa bar extending rearwardly from said innerdiefsaid' bar detachably engaging said inner die; supporting' means engaging the vrearward end vof said bar for holding it in engagement with said innerdie during the operation of said pusher means to push said tubular member through said outer Vdie and over said inner,` die; means for moving said. bar'from en` gagernent with said inner die;` and means between said dies andsaid supporting means for said bar forrreceiving said tubular member from said pusher head adapted to engage an end of said tubular member, and means for motivating said pusher head toward said outer die; an inner die axially aligned with said outer die; a bar extending axially from said inner die for holding Said inner die axially aligned with said outer die, said bar being detachable from said inner die; means for supporting the outer end of said bar during the forcing of said tubular member through said outer die and over said inner die; and means for moving said bar axially from engagement with said inner die.

1S. A device of the character described for sizing a tubular member, including: an outer die adapted to receive said tubular member; pusher means spaced from the forward end of said outer die, said pusher means comprising a pusher head adapted to engage an end of said tubular member, and means for motivating said pusher head toward said outer die; an inner die axially aligned with said outer die; a bar extending axially from said inner die for holding said inner die axially aligned with said outer die, said bar being detachable from said inner die; means for supporting the outer end of said bar during the forcing of said tubular member through said outer die and over said inner die; means for moving said bar axially from engagement with said inner die; and supporting means between said pusher means and said dies for supporting said tubular member in a position of axial alignment with said dies.

19. A device of the character described for sizing a tubular member, including: an outer die adapt-ed to receive said tubular member; pusher means spaced from the forward end of said outer die, said pusher means comprising a pusher head adapted to engage an end of said tubular member, and means for motivating said pusher head toward said outer ie; an inner die axially aligned with said outer die; a bar extending axially from said inner die for holding said inner die axially aligned with said outer die, said bar being detachable from said inner die; means for supporting the outer end of said bar during the forcing of said tubular member through said outer die and over said inner die; means for moving,r said bar axially from engagement with said inner die; supporting means between said pusher means and said dies forv supporting said tubular member in a position of axial alignment with said dies; and means between said dies and said supporting means for said bar for receiving said tubular member from said dies and supporting the same after removal of said bar from engagement with said inner die.

20. A device of the character described for sizing a tubular member comprised of a metal sheet having its longitudinal edges connected by a weld, including: an outer die adapted to receive said tubular member; pusher means spaced from the forward end of said outer die, said pusher means comprising a pusher head adapted to engage an end of said tubular member, and means for motivating said pusher head toward said outer die; an inner die axially aligned with said outer die; a bar extending rearwardly from said inner die, said bar detachably engaging said inner die; supporting means engaging the rearward end of said bar for holding it in engagement with said inner die during the operation of said pusher means to push said tubular member through said outer die and over said inner die means for moving said bar from engagement with said inner die; and

trimming means for smoothing the weld of said tubular member.

21. A device of the character described for sizing a tubular member, including: an inner die; means for supporting said inner die in a position of operation, including a bar detachably engaging said die, means engaging the outer end of said bar for supporting the same, and means for moving said bar axially from engagement with said die so as to'leave said die in its position of operation; and pusher means spaced from the forward end of said die, said pusher means comprising a pusher head for engaging an end of said tubular member, and means for motivating said pusher head toward said die so as to force said tubular member over said die. y

22. A device of the character described for forming pipe from a tubular member comprised of sheet metal with its longitudinal edges in conjunction, including: an outer forming die means of tubular form adapted to receive said tubular member; an inner forming die means axially aligned with said outer forming die means; means for holding said inner forming die means within said outer forming die means; and means causing relative movement between said tubular member and said die forming means so as to move said tubular member through said outer forming die means andv over said inner forming die means.

23. A device of the character described for forming pipe from a tubular member comprised of sheet metal with its longitudinal edges in conjunction, including: an outer forming die means of tubular form adapted to receive said tubular member; an inner forming die means axiall aligned with said outer forming die means; means for holding said inner forming die means Within said outer forming4 die means; means causing relative movement between said tubular member and said die forming means so as to move said tubular member through said outer forming die means and over said inner forming die means; and means for welding together the longitudinal edges of said tubular member during its movement through said outer forming die means.

24. A device of the character described for forming pipe from a tubular member comprised of sheet metal with its longitudinal edges in conjunction, including: an outer forming die means of tubular form adapted to receive said tubular member; an inner forming die means within said outer forming die means and having its outer surface spaced therefrom a distance to permit passage of said tubular member between said forming die means; means for supporting said inner forming die means within said outer forming die means; actuating means for moving said supporting means into and out of .engagement with said inner forming die means; and means for moving said tubular member through said outer forming die means and over said inner forming die means.

25. A device of the character described for forming pipe from a tubular member comprised of sheet metal with its longitudinal edges in conjunction, including; an outer forming die means of tubular form adapted to receive said tubular member; aninner forming die means within said outer forming die means and having its outer surface spaced therefrom a distance to permit passage of said tubular member between said forming die means; means for supporting said inner forming die means within said outer forming die means; actuating means for moving said supporting means into and out of engagement with said innerforming die means; and means causing relative movement between said tubular member and said outer and Yinner forming die means.

26. A device or" the character described for forming pipe from a tubular member comprised of a metal sheet with its longitudinal edges in conjunction, including: an outer forming die of tubular form adapted to receive said tubular` member; an inner forming die disposed within said outeriorming die; a bar for supporting said inner forming die; means for holding said bar in engagement with said inner forming die means for moving said bar into and out ofengagement Withsaid inner forming die; and means causing relative movement between said tubular member and said inner and outer forming dies.

27. A device of the character described for forming pipe from a tubular member comprised oi a metal sheet with its longitudinal edges in conjunction,rincluding: an outer forming die of tubular iorm adapted to receive said tubular member; an inner forming die disposed within said outer forming die; a bar for supporting said inner forming die; means for holding said bar `in engagement with said inner forming die means for moving said bar into and out of engage- `ment with said inner forming die; means causing relative moven'ient between said tubular member and said inner and outer forming dies; and means for welding together the longitudinal `edges of said tubuiar member during the movement between said tubular member and said inner and outer forming dies. i

28. A device of the characterVV described for forming pipe from a tubular member comprised of a metal sheet withrts longitudinal edges in conjunction, including: an outer forming die of Vtubular form adapted to receive said tubular member; an inner forming die disposed within said outer forming die; a bar for supporting said inner forming die; means for holding said bar in engagement with said inner forming die; means for moving said bar into and out of engagement with said inner forming die; means `causing relative movement between said' tubular member and said inner` and outer forming dies;

`means for welding together the longitudinal edges of said tubular member during the movement between said tubular member and said `inner and outer forming dies; and means associated with said inner and outer forming dies for removing the extruding portions of the weld.

29. A device of the character described for forming pipe from a tubular member comprisedV of a metal sheet with its longitudinal edges in conjunction, including: an outer forming die oi tubular form adapted to receive said tubular member; an inner forming die disposed within said outer forming die; a bar for supporting said inner forming die; means for holding said bar in engagement with said inner forming die; means `for moving said bar into and out of engagement with said inner forming die; means causing relative movement between said tubular member andV said inner and outer forming dies; means for welding together the longitudinal edges of said tubularmember during the movement between said tubular member and said inner and outer forming dies; and means associated withv said outer forming die for removing the extruding portions of the weld.

30. A device of the character described for forming pipe from a tubular member comprised of a metal sheet with its longitudinal edges in conjunction, including: outer forming die means adapted to receive said tubular member; inner forming die means disposed within said outer forming die means; means for supporting said inner forming die means within said outer forming die means;

eans for moving said inner ,forming die supporting means into and Y out of engagement, with said inner forming die means; means causing relative movement between saidtubular member and said inner and outerl forming `die means; means for welding together the longitudinal edges of said tubular member during the movement between said forming die means; and means associated with one or the other of said forming die means for removing the extruding portions of the weld.

31. A combination as set forth in claim 30 Y whichV includes a means for changing the width of the space between said inner and outer forming die means.

32. A combination as set forth in claim '30 which includes a means associated with said inner forming die means for changing the width of the space between said outer and inner forming die means.

33. A combination as set forth in claim 24 which includes a means for changing the diam'- eter of said inner forming die means.

34. A combination as set forth in claim 24 which includes a means associatedV with said inner forming die means for changing the width of the space. between said inner and outer forming die means.

HAROLD U. BAKER. 

